CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($)	Total	Common Stock	Treasury Stock	Additional paid-in capital	Accumulated deficit
Beginning balance at Dec. 31, 2018	$ 42,451,169	$ 38,967	$ (18,929,915)	$ 94,385,230	$ (33,043,113)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	309,563			309,563
Net loss	(2,175,258)				(2,175,258)
Ending balance at Mar. 31, 2019	$ 40,585,474	$ 38,967	$ (18,929,915)	94,694,793	(35,218,371)
Beginning balance (in shares) at Dec. 31, 2019	39,612,659	39,612,659	(12,253,502)
Beginning balance at Dec. 31, 2019	$ 35,864,471	$ 39,613	$ (18,929,915)	96,105,851	(41,351,078)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 426,939			426,939
Exercise of stock options (in shares)	110,000	100,000
Exercise of stock options	$ 175,000	$ 100		174,900
Net loss	$ (2,214,139)				(2,214,139)
Ending balance (in shares) at Mar. 31, 2020	39,722,659	39,712,659	(12,253,502)
Ending balance at Mar. 31, 2020	$ 34,252,271	$ 39,713	$ (18,929,915)	$ 96,707,690	$ (43,565,217)